Smoking implement with filter



Jan. 31, 1961 c. KLOPP 2,969,796

SMOKING IMPLEMENT WITH FILTER Filed Dec. 6, 1957 a: M as 7 /3 (r I /6 4 w. jL xi/g: Q I:

4*: ggdg g 52 .lm/emon' CARL KLOPP BY v ' AGENT United States SMOKING IMPLEMENT WITH FILTER Carl Klopp, Unter den Linden 1, Frankfurt am Main, Germany Filed Dec. 6, 1957, Ser. No. 701,117

1 Claim. (Cl. 131-205) My present invention relates to a smoking implement having means for filtering the tobacco smoke.

Filtering inserts are known for pipes as well as for cigar and cigarette holders. Heretofore, it has been found ditficult to avoid an early contamination of the filters with harmful tars and other tobacco residue so that their lifetimes has been comparatively limited. This has been true even in the case of pipes in which the filter space is separated from a tobacco-bearing grid by a clearance designed to receive the residue of combustion, owing to the fact that the upper part of the filter is in direct contact with the deposited tars and ash so as to become quickly clogged thereby; at the same time the accumulated hot residue at the filter entrance greatly raises the temperature of the smoke so as to result in an unpleasant burning sensation on the tongue of the user.

The general object of my present invention is the provision of means for avoiding the drawbacks set out above.

A more specific object of this invention is to provide an improved pipe or other smoking implement in which the smoke does not traverse the combustion residue on its way through the filter and in which this filter is so arranged that no objectionable clogging will occur, even after prolonged use, by reason of the entrainment of tars and other combustion products by the smoke.

In accordance with a feature of this invention I provide, in the bowl of a pipe, a preferably removable insert which supports the usual grid (e.g. a perforated plate) at a distance above the bowl bottom, thereby constituting a clearance for the deposit of residue, and which forms a channel extending into the filter mass to a point substantially below the level at which the smoke channel of the pipe stem enters the filter chamber; this insert is provided with one or more entrance apertures for the smoke, located well above the bottom of the bowl, preferably within the residue chamber underneath the tobacco-bearing grid.

The above and other objects and features of my invention will become more fully apparent from the following detailed description of a preferred embodiment, reference being made to the accompanying drawing in which:

Fig. l is a side-elevationa-l view of a removable insert for a smoking implement according to the invention;

Fig. 2 is a top plan view of the insert shown in Fig. 1;

Fig. 3 is a longitudinal sectional view of a tubular extension used with the insert of Figs. 1 and 2;

Fig. 4 is a top plan view of the extension of Fig. 3; and

Fig. 5 shows, in longitudinal section, a complete pipe incorporating the elements of Figs. 1-4.

The pipe shown in the drawing consists of three principal parts, namely the bowl 1 designed to receive the tobacco, the insert 2 with tubular extension 3, and the stem 18 forming a chamber 4 filled with the spongy filter mass 5.

The interior 6 of the bowl 1, constituting a combustion chamber, is adapted to be filled with tobacco (not shown) in a manner well known. The lower end of the bowl 1 terminates in a neck 20 having fine threads 7 adapted to engage complementary screw threads on the upper part of filter chamber 4. Insert 2, removably positioned in the combustion chamber 6 of bowl 1, consists of a beveled disc 8 having perforations 9, a dependent nipple 10 having a central bore 12 which is closed at the top, and a shoulder 14 adapted to seat on the bottom 15 of the bowl. The lower part of nipple 10, underneath shoulder 14, has male threads 11 mating with corresponding female threads on extension tube 3 which snugly fits into a central bore of neck 20 and traverses the greater part of the filter mass 5. The interior of tube 3 communicates, by way of bore 12 and lateral openings 13 in nipple 10, with the residue space 16 formed between disc 8 and bowl bottom 15. The lower end of tube 3 is located well above the bottom 17 of filter chamber 4 but substantially below the level at which smoke channel 22 of stem 18 enters the chamber 4. Channel 22 terminates at the tip of mouthpiece 21 in lateral exit openings 23 for the smoke.

In use, tars and ash dropping through the perforations 9 of disc 8 will accumulate on the bottom 15 of bowl 1 but will not obstruct the entrance openings 13 through which the tobacco smoke passes directly into the lower part of filter 5. Any combustion products entrained by the smoke and separated from it by the filter will tend to accumulate on bottom 17 of chamber 4 without objectionably clogging either the filter itself or the entrance of channel 22. It has been found that a pipe so constructed can be used without change of filter, even by an incessant smoker, for one or two months and that there is materially less impairment of flavor than in the case of pipes having filters liable to ready clogging. Furthermore, the relatively large mass of filter material results not only in purification but also in efifective cooling of the smoke. The detachability of the bowl 1 and of the insert 2 with its extension 3 enables convenient cleaning and exchange of filters.

My invention is, of course, not limited to the specific embodiment described and illustrated but is capable of numerous modifications and adaptations without departing from the spirit and scope of the appended claim. In particular, it is not restricted to pipes but may be used with any smoking implement, including cigar or cigarette holders, having a space adapted to accommodate a spongy filtering mass (with or without compression) at a location remote from a combustion chamber.

I claim:

A tobacco pipe comp-rising a bowl having a lower filter chamber provided with an opening in a wall portion communicating with a smoke duct in a stem portion of the pipe, said chamber having an upper centrally apertured closure with an upper surface providing the lower wall of a tobacco chamber formed with an upwardly diverging conical wall and located above the filter chamber, and an insert comprising a vertically disposed hollow tube open at the bottom and closed at the top end and having a foraminous disc afiixed to said top end so that the plane of the disc is perpendicular to the longitudinal axis of the tube, said insert having a shoulder flange spaced below the disc and said tube having at least one smoke-passing aperture in the wall portion thereof located between the shoulder flange and the disc, the diameters of the aperture in the closure wall of the filter chamber, of the tube, of the shoulder flange, of the disc and of the a: tobacco chamber being such that when the insert is References Cited in the file of this patent placed in the bowl the shoulder fiange t lill rest on the UNITED STATES P ATENTS- bottom of the tobacco chamber to posltlon the dlsc so that the outer periphery thereof will contact the inner 1,310,856 C b l y 9 surface of the conical wall of the tobacco chamber and 5 1,513,147 zahanfidls 06L 9 the bottom end of the insert will extend into the filter 1,521,984 Baftevlan Jail- 5 chamber whereby smoke may be drawn through the 1533340 Blldsoe n 1927 foraminous disc, into the hollow tube through the aper- 2,264,625 Dunwoodle 9 ture between the shoulder flange and the disc, downt wardly into the filter chamber and through the duct in 10 FOREIGN PATENTS the stern portion of the pipe 4,616 Great Britain 1896 

